# What is absolute zero temperature? - Thermodynamics

Q.  The temperature at which a system undergoes a reversible isothermal process without transfer of heat is called as _________
- Published on 21 Aug 15

a. critical temperature
b. Kelvin temperature
c. absolute zero temperature
d. reversible temperature

According to the definition of Kelvin scale,

Q/Qt = T/ Tt

T = 273.16 (Q/Qt)

from the above equation, it is clear that the heat transferred isothermally between two adiabatic bodies decreases if temperature decreases. Here Qt is the thermometric property. Therefore, from above equation if Q is having smaller value then T also lowers. The smallest possible value of Q is zero and corresponding T is zero.

Thus, the temperature at which a system undergoes a reversible isothermal process without transfer of heat is called as absolute zero. At absolute zero, an isotherm and adiabatic are identical.

## ➨ Post your comment / Share knowledge Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)